24" barrel. The 133/135 Bergers and 134 ELDs I'm running at 3200. The 138s liked 3150 bestThat sounds really good. How long of a barrel are you using?
Hornady's heavy for caliber 25 cal bullets seem to shoot extremely well. I have some of the new A-Tip 138's on the shelf but so far only shot the 134 ELD-M in my 25 SAUM and they're going 3190 out of a 22in 8tw Bartlein and stacking them up in to tiny little groups.